| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
We developed a novel technique for a gravity meter using optical radiation pressure to obtain better sensitivity than that of a superconductive gravity meter. In this scheme, an optical Fabry-Perot(FP) cavity is set vertically and is set semi-resonant state to obtain an optical spring effect. Additionally, one of mirrors for the FP cavity is planed to be levitated by radiation pressure of a laser beam inside the Fabry-Perot cavity by setting the weight of the mirror light. Although we encountered an unstable phenomena due to the optical spring state, we succeeded to keep the semi-resonant state by a moderate feedback control system and verified the effect of the radiation pressure inside the FP cavity.
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